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All results from a given calculation for CH3CO (Acetyl radical)

using model chemistry: HF/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at HF/CEP-121G
 hartrees
Energy at 0K-28.300894
Energy at 298.15K-28.303257
HF Energy-28.300894
Nuclear repulsion energy34.226820
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at HF/CEP-121G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 947 864 0.40      
2 A' 498 454 12.20      
3 A" 3276 2990 11.84      
4 A" 1598 1458 18.70      
5 A" 1069 976 0.01      
6 A" 106 97 0.00      
7 A' 3276 2989 15.38      
8 A' 3165 2888 10.58      
9 A' 1912 1744 174.83      
10 A' 1602 1462 29.89      
11 A' 1531 1397 14.77      
12 A' 1178 1075 13.66      

Unscaled Zero Point Vibrational Energy (zpe) 10078.2 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 9196.3 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at HF/CEP-121G
ABC
2.90076 0.32245 0.30653

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.928 -0.677 0.000
C2 0.000 0.523 0.000
O3 1.199 0.581 0.000
H4 -0.358 -1.600 0.000
H5 -1.564 -0.633 0.876
H6 -1.564 -0.633 -0.876

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6
C11.51662.47091.08481.08391.0839
C21.51661.20082.15302.13332.1333
O32.47091.20082.67973.14293.1429
H41.08482.15302.67971.77681.7768
H51.08392.13333.14291.77681.7527
H61.08392.13333.14291.77681.7527

picture of Acetyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 130.464 C2 C1 H4 110.613
C2 C1 H5 109.108 C2 C1 H6 109.108
H4 C1 H5 110.026 H4 C1 H6 110.026
H5 C1 H6 107.906
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.517      
2 C 0.207      
3 O -0.246      
4 H 0.183      
5 H 0.187      
6 H 0.187      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.028 -1.669 0.000 3.458
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.724 -0.866 0.000
y -0.866 -18.884 0.000
z 0.000 0.000 -17.038
Traceless
 xyz
x -2.763 -0.866 0.000
y -0.866 -0.003 0.000
z 0.000 0.000 2.766
Polar
3z2-r25.532
x2-y2-1.840
xy-0.866
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.354 0.349 0.000
y 0.349 3.270 0.000
z 0.000 0.000 2.691


<r2> (average value of r2) Å2
<r2> 38.735
(<r2>)1/2 6.224